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Search: Posts Made By: Denial140
Forum: Lone Mersenne Hunters 2022-10-26, 08:33
Replies: 2,224
Views: 381,021
Posted By Denial140
M2223391 has a factor:...

M2223391 has a factor: 443333026740484658443526761

27 digits, ECM curve 6 at B1=250K

9 to go :)
Forum: Miscellaneous Math 2022-10-13, 21:37
Replies: 20
Views: 2,781
Posted By Denial140
Perhaps in a couple of years they will have...

Perhaps in a couple of years they will have proved the supremum is at least 5/4
Forum: Lone Mersenne Hunters 2022-10-04, 06:54
Replies: 2,224
Views: 381,021
Posted By Denial140
P-1 found a factor in stage #2, B1=50000000,...

P-1 found a factor in stage #2, B1=50000000, B2=160135168050.
M4968559 has a factor: 4518377100979343670213622713401394014756052836040689096521220599831 (P-1, B1=50000000, B2=160135168050)

Of...
Forum: Software 2022-10-04, 06:47
Replies: 97
Views: 10,363
Posted By Denial140
I had something similar happen when I first ran a...

I had something similar happen when I first ran a curve with build 2. Since i forgot to change the memory settings from the default it crashed at the end of stage 1. I assumed this was because it was...
Forum: GMP-ECM 2022-09-25, 14:20
Replies: 29
Views: 3,981
Posted By Denial140
It sounds more likely to me that the different...

It sounds more likely to me that the different starting points correspond to different sigma values, which change the B1/B2 required to find the factor. For any starting point, you can run the curve...
Forum: Proth Prime Search 2022-09-19, 11:44
Replies: 75
Views: 7,819
Posted By Denial140
https://en.wikipedia.org/wiki/Carmichael_number#Di...

https://en.wikipedia.org/wiki/Carmichael_number#Distribution
Forum: Software 2022-09-11, 11:17
Replies: 97
Views: 10,363
Posted By Denial140
If you are running curves on many exponents,...

If you are running curves on many exponents, simply having the exponents in the worktodo file will make it run stage 1 on one of the later exponents if the memory is not available. A similar effect...
Forum: mersenne.ca 2022-09-07, 08:55
Replies: 973
Sticky: mersenne.ca
Views: 138,556
Posted By Denial140
I don't think the t-levels sometimes displayed...

I don't think the t-levels sometimes displayed are particularly accurate - as far as I can tell, they have been calculated by taking the highest digit level with sufficient curves, and then adding on...
Forum: Factoring 2022-09-07, 07:31
Replies: 16
Views: 1,110
Posted By Denial140
To throw another opinion into the hat, if I...

To throw another opinion into the hat, if I decided to offer this there would likely be a rather steep increase in price around 512 bit cofactors...
Forum: Data 2022-08-27, 16:43
Replies: 1,414
Views: 213,450
Posted By Denial140
P-1 found a factor in stage #2, B1=859433,...

P-1 found a factor in stage #2, B1=859433, B2=148052100.
M108906529 has a factor: 4081181996838659866466757911 (P-1, B1=859433, B2=148052100) :banana:

Took 48 attempts, with expected 3.7%...
Forum: Data 2022-08-25, 05:33
Replies: 229
Views: 26,046
Posted By Denial140
Sounds good - I'd like to note that I am still...

Sounds good - I'd like to note that I am still working on 4.96M (albeit slowly), so if you could avoid those that would be great. I think it was removed from the first page because I didn't find a...
Forum: Lone Mersenne Hunters 2022-08-18, 12:05
Replies: 2,224
Views: 381,021
Posted By Denial140
Do you know roughly how much ECM you did?...

Do you know roughly how much ECM you did? Wondering if I should just move to t30 bounds straight away
Forum: Lone Mersenne Hunters 2022-08-17, 23:56
Replies: 2,224
Views: 381,021
Posted By Denial140
ECM found a factor in curve #27, stage #2 ...

ECM found a factor in curve #27, stage #2
Sigma=8224392319313050, B1=50000, B2=117709515.
M2223281 has a factor: 270242207010285199568677607 (ECM curve 27, B1=50000, B2=117709515)

The group...
Forum: Software 2022-08-16, 04:37
Replies: 97
Views: 10,363
Posted By Denial140
I have occasionally been doing ECM in this range...

I have occasionally been doing ECM in this range for a while - I have not submitted all my work yet, but I will soon have most exponents in the range to t25. If you wish to start towards t30 (i.e....
Forum: Hardware 2022-08-13, 17:25
Replies: 6
Views: 1,223
Posted By Denial140
The RAM settings are (as far as I know) not used...

The RAM settings are (as far as I know) not used for PRP testing. They only determine how much RAM is allowed for use in stage 2 of P-1, P+1 and ECM factoring methods.

Turning off the overclocks...
Forum: Data 2022-08-02, 10:39
Replies: 229
Views: 26,046
Posted By Denial140
Yes, I have been quite unlucky so far. There are...

Yes, I have been quite unlucky so far. There are 83 exponents left for P-1, and 160 left for TF to 75. Given 1 expected factor from the TF, I need a 10.8% hit rate from the P-1. I guess this is still...
Forum: Data 2022-07-22, 10:57
Replies: 1,414
Views: 213,450
Posted By Denial140
I'll have a crack at some with B1=B2.

I'll have a crack at some with B1=B2.
Forum: Miscellaneous Math 2022-07-16, 15:27
Replies: 29
Views: 2,880
Posted By Denial140
This algorithm is detailed in the "Trial...

This algorithm is detailed in the "Trial Factoring" section of the maths page on mersenne.org (https://www.mersenne.org/various/math.php). So there is no doubt this is already being used.
Forum: Software 2022-06-29, 22:22
Replies: 97
Views: 10,363
Posted By Denial140
I would be interested in using it e.g. to speed...

I would be interested in using it e.g. to speed up the ECM work on 2.22M-2.23M to take it to below 200 exponents unfactored.
Forum: Lone Mersenne Hunters 2022-06-08, 19:20
Replies: 2,224
Views: 381,021
Posted By Denial140
Sorry, I was not clear - I mean specifically...

Sorry, I was not clear - I mean specifically testing for machine errors without taking too long.
Forum: Lone Mersenne Hunters 2022-06-08, 15:42
Replies: 2,224
Views: 381,021
Posted By Denial140
I've been running large P-1 on 4.96M to 4.97M...

I've been running large P-1 on 4.96M to 4.97M without much luck (3 factors in 84 attempts, P-1 calculator predicts 12% increase in factor probability), with a success this morning! M4963463 has...
Forum: Software 2022-04-19, 21:11
Replies: 781
Views: 83,317
Posted By Denial140
I think this may be an issue with the P-1...

I think this may be an issue with the P-1 algorithm itself rather than v30.8b14 - I haven't checked the rest, but for M41, all factors have k that is 50000-powersmooth, but the largest factor of M73...
Forum: Data 2022-04-14, 21:24
Replies: 229
Views: 26,046
Posted By Denial140
I started work on 4.96M unfactored with B1=25M....

I started work on 4.96M unfactored with B1=25M. With 28GB of RAM assigned, the 20M/exponent*500*sqrt(RAM/16) gives 2667, and the actual ratio around 2700. The predicted probability with an extra bit...
Forum: Data 2022-04-10, 18:50
Replies: 229
Views: 26,046
Posted By Denial140
Perhaps I overestimated the B2/B1 ratio that will...

Perhaps I overestimated the B2/B1 ratio that will get used. Will keep this in mind, thanks
Forum: Data 2022-04-10, 13:13
Replies: 229
Views: 26,046
Posted By Denial140
Since the below 2k project is finishing very...

Since the below 2k project is finishing very soon, I would like to reserve 4.96M unfactored, with a view to taking it below 200 exponents. I set a rough guess at B1=25M for this but I'll see when I...
Showing results 1 to 25 of 29

 
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